Re: [foxboro] Foxboro and Allen Bradley

Not much to add, but aren't there MicroIA solutions
available that will connect via ethernet/ip to PLC's? 
No one has mentioned them yet.  There was also some
talk a while back about there being a redundant option
(in addition to fault tolerant) available in the
future.

If available the MicroIA would then be used instead of
the AB30's...

chris.


--- Rick de la Cierva <rcierva@xxxxxxxxxxxxxxxx>
wrote:
> 
> Bob,=20
> 
> I think you caught many on vacation since this topic
> usually has many
> interested subscribers willing to dive in. While I
> was at lunch tough I
> did see Joe provided some feedback also.
> 
> The AB30 is a standard Foxboro module that can be
> configured redundant.
> One of the ports is configured to communicate to the
> CAM (see modules
> listed below) that converts it to DH+. The
> limitations are: "The Gateway
> supports a maximum of 16 I/A Series Allen-Bradley
> Scan Blocks (ABSCAN)
> to perform input/output functions with up to eight
> PLC controllers". I
> believe these are not hard limitations but mostly
> throughput limitations
> one should follow. This module is basically just a
> control processor 30
> that can interface to PLCs. It only performs control
> functions.
> 
> The Foxboro edocs indicate the interface modules
> that can be used with
> the the AB30 are " The Gateway interfaces to the
> Allen-Bradley Data
> Highway using 1771-KE/KF, 1770-KF2 Series B, or
> 1779-KFL (in 1771-KE/KF
> Emulation Mode) Communication Adapters". Note that
> they are all for data
> highway and not direct to ENET. I looked at the
> information on the
> 1761-NET-ENI and it seems like it should work also
> but Rockwell has the
> following note on their about this module: "Lets you
> connect MicroLogix
> (or other products with an RS-232-C port and DF1
> protocol) to an
> EtherNet/IP network and initiate a single-hop
> message with any
> EtherNet/IP device via a connected CIP message.
> Supports the NetLinx
> services." - Note the single hop - I am not sure how
> your network looks.
> 
> As Joe indicated, the other options to go directly
> to the PLCs on
> Ethernet is using either a 51 series(Solaris) or 70
> series Integrator -
> though these are not redundant. Basically these are
> either a Sun Box or
> a Windows NT PC that run the Foxboro blocks inside
> and connect to the
> PLC directly on Ethernet. I have not tried the 70
> series integrator but
> have used the 51 series. On these AB Interchange
> software is loaded and
> is used to communicate to the PLCs. These also have
> a lot more
> horsepower for blocks and your limitation is not the
> number of PLCs but
> the throughput on the communication network and the
> ability of the PLC
> to respond in adequate time. Since you mention the
> AB30 module I am
> guessing you have a typical Foxboro nodebus system
> and not a standard
> Ethernet system. You can add a second Ethernet card
> to these integrators
> to connect them to the PLC Ethernet network and
> connect the first
> Ethernet to a DNBT cart so that the integrator is
> also on your standard
> Foxboro nodebus network.
> 
> Give me a call if you want to discuss further.
> 
> Rick de la Cierva
> DLC SOLUTIONS CORP.
> 203-207-9917
> 
> 
> -----Original Message-----
> From: Marchal, Andre L.
> [mailto:AMarchal@xxxxxxxxxxxxxxx]=20
> Sent: Friday, December 28, 2001 10:36 AM
> To: 'foxboro@xxxxxxxxxxxxx'
> Subject: Re: [foxboro] Foxboro and Allen Bradley
> 
> 
> Bob,
> 
> I also tried to connect an INT30 to Allen Bradley
> 5/40E's without =3D
> success.
> I used an 1761-NET-ENI to do the DF1-RS232/Ethernet
> conversion.
> I do not know what the problem was (improper wiring,
> protocol, etc...).
> Please let me know if you find a successful method.
> 
> Bob, this is what I understand:  the INT30 for Allen
> Bradley can =3D
> communicate
> with up to 8 PLCs.  It has 2 redundant RS232 ports
> (that is a powerful =
> =3D
> and
> easy to use feature).  If you want to communicate
> with more PLCs, you =
> =3D
> would
> have to use one of the configured PLCs as a "mail
> box".
> 
> Here is what I used for my test:
> INT30=3D20
> SCSI cable P0500UX
> Serial connector P0970VB
> Ethernet interface 1761-NET-ENI (Allen Bradley)
> Serial cable 1761-CBL-PM02 (Allen Bradley)
> 
> Andr=3DE9 Marchal
> -----Original Message-----
> From: Robert Driscoll [mailto:rdrisco@xxxxxxxxxxx]
> Sent: Friday, December 28, 2001 7:55 AM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] Foxboro and Allen Bradley
> 
> 
> 
> Hello List,
> 
> I am installing several Allen Bradley PLCs and I
> want to connect them =
> =3D
> to a=3D20
> Foxboro system.  I know a few things about the
> Foxboro hardware but I =
> =3D
> have a
> 
> few questions.
> 
> How many PLCs can a single AB30 module be directly
> connected to?  The =
> =3D
> module
> 
> has four ports, so I assume it can go to four
> different PLCs?
> 
> I read the Foxboro on-line document and it discussed
> the RS232 =
> direct=3D20
> connection to a PLC, or a connection through a CAM. 
> My PLCs will =
> be=3D20
> networked together through a hub.  Is there a
> Foxboro way of =3D
> communicating=3D20
> to the PLCs via ETHERNET?  I could not find that in
> the
> documentation.  Is it possible to connect the Fox
> module(s) into the =3D
> hub and
> 
> have the devices talk that way?
> 
> Any other pitfalls with the AB30 (or other modules
> that may apply =3D
> here)?
> 
> Bob Driscoll
> Bravo Northwest Power Systems
> 
> 
> 
>
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>
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